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AI Connector Directory / Claude and ChatGPT

The connectors a small business can actually use.

Every connector in the official MCP Registry that does a small business job: booking, invoices, the CRM, the register, reviews, the phones. Sorted by job and by trade, with who publishes each one, how it signs in, and whether it comes from the product’s own maker. Refreshed every day.

Browse by job How we sort it

Made and maintained by Modern Mustard Seed. Refreshed Oct 13, 2026

A honeycomb wall of cubbies, each holding a smiling mustard seed with its own tool: a paintbrush, a headset, a wrench, a camera, a calculator, a megaphone.
One cubby for every job
Connectors listed
3,619
Jobs they cover
21
From the product’s own maker
1,698
Work by URL in Claude and ChatGPT
2,733

Browse / By job, then by trade

Pick your trade. Pick the job.

Choose a trade to see how many connectors serve it in each job, then open the job to read every listing with its publisher, sign-in and source.

Showing counts for every trade

Field service and trades

Jobs, dispatch, estimates and crews for contractors and home service companies.

119 connectors, 63 official

Booking and scheduling

Appointments, reservations and calendars customers book into.

161 connectors, 97 official

Invoicing and payments

Invoices, estimates, payment links and getting paid.

415 connectors, 181 official

Accounting and bookkeeping

The books: ledgers, expenses, reports and tax prep.

153 connectors, 65 official

CRM and sales

Contacts, leads, deals and follow up.

339 connectors, 147 official

Point of sale and retail

Registers, sales, items and inventory in a shop.

15 connectors, 5 official

Online stores and shipping

Products, orders, fulfillment and labels for selling online.

415 connectors, 195 official

Email and SMS marketing

Lists, newsletters, campaigns and text marketing.

88 connectors, 38 official

Social media and ads

Posting, scheduling and paid ads on the social platforms and Google.

551 connectors, 264 official

Reviews and reputation

Customer reviews, ratings and replies on Google, Yelp and the rest.

57 connectors, 22 official

Websites and local search

The website, the Google profile, search and AI search readiness.

468 connectors, 199 official

Phone, text and customer support

Calls, texts, voice agents, live chat and the help desk.

140 connectors, 60 official

Real estate and property

Listings, MLS data, rentals and property management.

237 connectors, 110 official

Legal and law practice

Law firm practice management, case law and legal research.

150 connectors, 69 official

Churches and nonprofits

Church management, giving, volunteers, Scripture and donors.

93 connectors, 45 official

Restaurants and hospitality

Menus, online ordering, reservations, delivery and hotels.

215 connectors, 118 official

Health, wellness and beauty

Practices, salons, spas, gyms and studios.

52 connectors, 33 official

Payroll, HR and staff scheduling

Payroll, timesheets, shifts and the people who work there.

96 connectors, 53 official

Documents, proposals and e-signature

Contracts, proposals and signatures.

62 connectors, 25 official

Forms, surveys and intake

Forms customers fill in and the answers they leave.

38 connectors, 23 official

Funding, grants and cash planning

Grants, small business loans and cash flow forecasts.

42 connectors, 23 official

Just updated / Official, works by URL

Fresh from the makers.

The eight official remote connectors updated most recently in the registry, whoever publishes them.

  1. korea-realty

    sallim.app app.sallim/korea-realty

    Korean real estate: court auctions, 10M+ MOLIT records, subscription notice facts, loan/DSR rules

    Source
    Published by sallim.app, the product's own domain
    Runs
    Remote: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Not declared in the registry
    URL
    https://realty.sallim.app/mcp?via=official
    Updated
    Oct 13, 2026

    Registry record for korea-realty (opens in a new tab)Website for korea-realty (opens in a new tab)Code for korea-realty (opens in a new tab)

  2. PaidPilot Invoice Tools

    api.paidpilot.io io.paidpilot.api/invoice-tools

    Pay-per-call invoice tools: payment reminders, late fees, payment terms, timesheet to invoice.

    Source
    Published by api.paidpilot.io, the product's own domain
    Runs
    Remote: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Not declared in the registry
    URL
    https://api.paidpilot.io/mcp
    Updated
    Oct 13, 2026

    Registry record for PaidPilot Invoice Tools (opens in a new tab)Website for PaidPilot Invoice Tools (opens in a new tab)

  3. TSF Booking

    book.scalingfirm.com com.scalingfirm.book/tsf-booking

    Salon and clinic appointments: check availability, hold slots, take deposits, move and cancel.

    Source
    Published by book.scalingfirm.com, the product's own domain
    Runs
    Remote: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Token in the Authorization header
    URL
    https://book.scalingfirm.com/mcp
    Updated
    Oct 13, 2026

    Registry record for TSF Booking (opens in a new tab)Website for TSF Booking (opens in a new tab)

  4. Inboxapp

    inboxapp.com com.inboxapp/inboxapp

    Shared inbox and CRM for your team's DMs on LinkedIn, X, Instagram, WhatsApp, Telegram and email.

    Source
    Published by inboxapp.com, the product's own domain
    Runs
    Remote: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Not declared in the registry
    URL
    https://mcp.inboxapp.com/mcp
    Updated
    Oct 12, 2026

    Registry record for Inboxapp (opens in a new tab)Website for Inboxapp (opens in a new tab)

  5. Realistimo

    realistimo.com com.realistimo/realistimo

    Free MCP server with Bulgarian property prices, rental yields, deal costs and neighbourhood profiles

    Source
    Published by realistimo.com, the product's own domain
    Runs
    Remote: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Not declared in the registry
    URL
    https://realistimo.com/mcp
    Updated
    Oct 12, 2026

    Registry record for Realistimo (opens in a new tab)Website for Realistimo (opens in a new tab)

  6. Journeyed: Los Angeles hotel facts

    journeyed.org org.journeyed/hotels

    Los Angeles hotel facts with sources: parking prices, fees, pets, check-in, pools, distances.

    Source
    Published by journeyed.org, the product's own domain
    Runs
    Remote: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Not declared in the registry
    URL
    https://journeyed.org/mcp
    Updated
    Oct 12, 2026

    Registry record for Journeyed: Los Angeles hotel facts (opens in a new tab)Website for Journeyed: Los Angeles hotel facts (opens in a new tab)

  7. Sendinel

    sendinel.ai ai.sendinel/mcp-server

    AI-controlled email ops for campaigns, contacts, segments, analytics, and sending.

    Source
    Published by sendinel.ai, the product's own domain
    Runs
    Remote or local: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Key or token in the SENDINEL_API_KEY setting
    URL
    https://sendinel.ai/mcp
    Updated
    Oct 12, 2026

    Registry record for Sendinel (opens in a new tab)Website for Sendinel (opens in a new tab)Code for Sendinel (opens in a new tab)

  8. Bowmark

    bowmark.ai ai.bowmark/bowmark

    Do things on live websites: prices, availability, quotes, bookings, anything behind a form or login.

    Source
    Published by bowmark.ai, the product's own domain
    Runs
    Remote or local: Added by URL, in Claude or ChatGPT where your plan allows custom connectors
    Auth
    Token in the Authorization header
    URL
    https://api.bowmark.ai/mcp/registry
    Updated
    Oct 12, 2026

    Registry record for Bowmark (opens in a new tab)Website for Bowmark (opens in a new tab)Code for Bowmark (opens in a new tab)

Coverage / Fewer than 10 official connectors

Where the makers have not shown up yet.

In these jobs, most connectors come from someone other than the software’s own maker. If your product serves one of them, your customers are using somebody else’s version, or none.

Want your product listed? We build connectors

Straight answers

Before you connect one.

Modern Mustard Seed builds connectors, and ours are in this directory. They are sorted by the same rules as every other listing, nobody pays to be listed or placed, and no listing is a review or a recommendation.

What is an AI connector?

A connector lets an AI assistant such as Claude or ChatGPT use another piece of software on your behalf: read your calendar, look up an invoice, check a review. Most connectors today use the Model Context Protocol (MCP), an open standard, and many are published in the official MCP Registry, which is where this directory reads from.

Do these work in both Claude and ChatGPT?

A remote connector is added by its URL. Claude and ChatGPT both accept remote MCP connectors on the plans that allow custom connectors. A local connector runs on your own computer, in Claude Desktop or another local client, and does not work in the ChatGPT website.

What does official mean here?

Official means the publisher proved it owns a domain to the MCP Registry, and the connector lives on that same domain and is not named after another company’s product. Everything else is community: published by a GitHub account, or by a company other than the product’s maker. Community connectors can be excellent; the label only says who published it.

Is a listed connector safe to use?

A listing is not a security review. Before you connect one, read who publishes it, what it can change, and how it signs in. A connector that signs in with your own account and asks before it writes is the safer shape. The auth column says what the registry declares and, for remote connectors, what the server asked for when we checked.

How often does the directory change?

Every day. A scheduled job reads what changed in the registry since the day before and rereads the whole registry once a week, so a connector that is removed, deprecated or no longer matches drops out within a week at most.

My connector is not listed. Why?

It has to be published in the official MCP Registry, marked active, and match the published category map on the methodology page. If it does all three and still is not here, write to us and we will look at the map, not at the connector.

Does Modern Mustard Seed rank its own connectors higher?

No. Our connectors are sorted by the same rules as everyone else’s: official first, then connectors that work by URL, then the most recently updated. Nobody pays to be listed or placed, including us.

Made and maintained by Modern Mustard Seed

Want your product in here?

We build connectors that put a software company’s product inside Claude and ChatGPT, publish them to the official registry, and they show up here by the same rules as everyone else.

We build connectorsRead the methodology

Claude is a product of Anthropic, and ChatGPT is a product of OpenAI. Modern Mustard Seed is an independent studio and is not affiliated with or endorsed by either. The MCP Registry is run by the Model Context Protocol project; this directory reads its public API.